Grapevine's Legoland Discovery Center just opened last April but is already going to expand.
The facility will add a $1 million driving course that will let the kids catch bad guys alongside Lego Texas Rangers -- law enforcement officers, not baseball players.
The Star-Telegram reports the Grapevine City Council recently approved a $500,000 grant to help pay for the expansion.
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The new attraction will open in the spring of 2012.